Precision interpupillary and bridge measure



A -w. H. oLDAcH. PRECISION IN-ERPUPILLARY AND BRIDGE MEASURE.

APPLICATION FILED SEPLZO. 1920- I 1,41 3,606. Patented Apr 25, 1922.

. 2 SHEETS-SHEET I.

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Arron/VHS 1 w. H. olnAcH. PRECISION INTERPUPILLARY AND BRI-DGE MEASURE.

APPUCATION FILED SEPTJO, i920.

Patented Apr. 25, 1922.

2 SHEETS-SHEET 2.

ATTORNEYS Y 1 wrmlrem Howarmonnacii, or PANAMA, rimarra. 11,

T 0 all whom t may concern:

Bel it known that I, vVVILLmM HOWARDV a resident of Panama,rin thefRepublic of Panama, have invented certain new and useful Improvements in Precision Interpupillary and Bridge Measures, of which the following is a specification.

My Yinvention relates toopticianS gages4 and has reference more particularly to interpupillary -and bridge measures the principal object being to producean optical gage in rule form in which an interpupillary measure and a Vbridge Ameasure are combinedin urements. n Y v Y I A v Means 'have been'A devi-sed to i Y determine these various measurementbut thesemeans v f thefbar' 3 being, it'ted to slide? on said-bar.

have been usually of such V'construction-v as to permit only axlimited number oi the various measurements, or'tliey comprise acum- Vbersome metal apparatus with numerous adjusting. andy complicated' parts.

It is for the purpose of overcoming these diiiiculties and permitting wide range in measurements and` at'the same time securing accuracy that I have devised the presentinvention. j

My invention, therefore, with the hereinbefore stated object, and others in view, consists in certain novel features of construction and arrangement of parts as will be hereinafter described and pointed out in the claims, reference being had to the accom,-

panying drawings inwhich,

Figure l is a front view of my improvement,

Figure 2 is a top edge view of same,- Figure 3 is a` rear view, e y Figure 4t is a vertical section showing vertical and horizontal posts and mount-ings,

Figure 5 is a viewin elevation of. the vertical post.`

Figure 6 is an enlarged vertical section taken on line 6-6 of Fig. l,

Figure 7 is a similar view on line 7 7 of Figure 1,

Figure 8 is an enlarged horizontal detail section showing caliper and post mounts,

Figure 9 is a perspective view of the shown; Y Y

fthe :pointerfand: into said 'end ofatheiingerI piece'll if 'rnncisroivINTERPUPILLAnY AND Balpen MEASURE] i Specification of Letters Patent. v A1313' 255.1922. vApplication'led September 20,1920. Serial No. 411,472. Y A

' ,bracket slide, bracketf'andpost bloclr disl assembled; OLDAGH, a citizen of the4 United States, and j As fshown in-the various iig'ures my rule .consists of a graduated steel straightedge having-applied toits front'face adjacent its lower edge,va mirror 2-which is of polished steel andv secured tothe straight-edge r'by :small screws as showin-or therelecting l areaimay bethehighly polished tace of the i straight edge.

f lAbovethe reflectorafl'at slide bar 3 `is provided the ends thereot` being screwed to the 'ruleV and between the ends the: bar being set off-from 'the front face of th-erule. Upon this. bar adjacent thewleit,endl-isy placed a pointer t, which isiXedand rigidly secured,v tothe bar 3'byatopscrew.y

Aboveathe `slide bar ytlfe rule is providedY Fwithfanelengated; slotA 5 which isv approxi-y `rfi-5 mately of the same extentas th-eimirror, the upper' edge oil the slot y'being graduated" as Amov'able `pointer `also -mounted- :and being held to the'samefby a .bent'clipl 7 'one' end ofA` which -extends,through the slot 5,-,and-lt-he other end being securedto the bar by screws'passing throughthebody of The lower and Vat the right hand end oftherule aT head 8 isplaced said head being of thek same thickness as the rule and also having tudinally.

This head isconnected to; the rule byia dove-tailed or under cut caliper -9 which slides in an under-cut or 'dove-tailed recess lOVin the rear face of the rule and extending from its right end inwardly' a lsuitable dis` tance to V completely house the slide stem and permit the head lto .fit closely against the right end of the rule. VOne edgeofthis recess or groove is provided with the necessary graduations llfwhich represent standfV yA ard and linger piece-measurements in milli-M meters.

Secured:` totheouter face of this caliper Vi I or stem 9 or made integral therewith if preerred, is an under cut rib *or guide 12 upon'which isv fitted to slidehorizontally a edge the rule-*mis '9o. its lower edge rounded laterally andlongi- .f r

necting bar l5 having an under cut groove 16 which 4has a'sliding lit on the under cut rib or guide l2.

Between the jaws of the bracket is hinged a block 17 having one rear corner rounded olf as at 18 the free end of the said block having a rectangular aperture 19 there through in which is slidably mounted a vertical post 20 with graduations thereon. The lowerY end of this post carries a sleeve 2l .having va rectangular aperture Q2 there`r through in which slides a horizontal post 23, at one end of which is hinged a bridge pad 24 operating on a graduated quadrant 25, the horizontal post being graduated to register lateral rposition oit bridge crests in standard spectacles and finger piece bridge depths, and same in millimeters, the nose `pad operatingl on quadrant graduated to VLlis bisected by same, observersposition 'being so that reilection in mirror of observing 1.

eye is also bisected by pointer, and vthe movable pointer or indicator is adjusted so vthat relation ofother eye to observers eye isV the same, reading being taken from the position ot movable pointer or indicator.

To take bridge measurement, instrument is reversed and sliding end` 8 drawn out making an aperture or space sufficiently Wide Vto saddle bridge of nose, tightly if l linger piece ol eye glass measurement Ais desired, loosely if regular spectacle bridge measurementk isv desired; then with lower edge of rule bisecting pupils of eye laterally adjustment of lbridge padY on sliding vertical and horizontal posts is made, base of bridge being read from instrument caliper or slide, height fromv vertical post, and angle of crest from quadrant onbridge pad. The inside plane of rule will be plane oit lens.

l claim i. l. In a device as herein characterized, a

`graduated rule having an elongated slot therethrough an elongated reflecting area on one tace of said rule extending in the direction of the length of'said slot,a fixed pointer extending transversely across said slot adjacent one end thereof, and second pointer or indicator slidably mounted on said rule between said fixed pointer and the other end of the slot, said slidable pointer also extending transversely across said slot.

2, An instrument for the purposes speci? lied, comprising a graduated steel straight edge, having an aperture through which the I pupils of the eyes may bev observed, a re' fleeting area for reflecting the image of the observers/eyes, a Xed indicator for registering lthe position ol one eye, and amovof the other eye. Y v

'3. As a new rticle of manufacture a graduated rule having an elongated sight aperture therethrough a mirror disposed beable indicator for registeringV the.` position low the lower edge of said apertureythe f.

length of said mirror approximately the Vsame as that of the aperture, and a fixed and a sliding indicator extending across said aperture.

WILLIAM HOWARD oLDAcH. y 

